ceph/src/boost/libs/thread/test/threads/this_thread/sleep_until/sleep_until_pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 // Copyright (C) 2011 Vicente J. Botet Escriba
  10 //
  11 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
  12 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  13
  14 // <boost/thread/thread.hpp>
  15
  16 // thread::id this_thread::get_id();
  17
  18 #include <boost/thread/thread_only.hpp>
  19 #include <cstdlib>
  20 #include <algorithm>
  21
  22 #include <boost/detail/lightweight_test.hpp>
  23
  24 #if defined BOOST_THREAD_USES_CHRONO
  25
  26 int main()
  27 {
  28   {
  29     typedef boost::chrono::steady_clock Clock;
  30     typedef Clock::time_point time_point;
  31     //typedef Clock::duration duration;
  32     boost::chrono::milliseconds ms(500);
  33     time_point t0 = Clock::now();
  34     boost::this_thread::sleep_until(t0 + ms);
  35     time_point t1 = Clock::now();
  36     boost::chrono::nanoseconds ns = (t1 - t0) - ms;
  37     boost::chrono::nanoseconds err = ms / 100;
  38     // The time slept is within 1% of 500ms
  39     // This test is spurious as it depends on the time the thread system switches the threads
  40     BOOST_TEST((std::max)(ns.count(), -ns.count()) < (err+boost::chrono::milliseconds(1000)).count());
  41     //BOOST_TEST(std::abs(static_cast<long>(ns.count())) < (err+boost::chrono::milliseconds(1000)).count());
  42   }
  43   {
  44     typedef boost::chrono::system_clock Clock;
  45     typedef Clock::time_point time_point;
  46     //typedef Clock::duration duration;
  47     boost::chrono::milliseconds ms(500);
  48     time_point t0 = Clock::now();
  49     boost::this_thread::sleep_until(t0 + ms);
  50     time_point t1 = Clock::now();
  51     boost::chrono::nanoseconds ns = (t1 - t0) - ms;
  52     boost::chrono::nanoseconds err = ms / 100;
  53     // The time slept is within 1% of 500ms
  54     // This test is spurious as it depends on the time the thread system switches the threads
  55     BOOST_TEST((std::max)(ns.count(), -ns.count()) < (err+boost::chrono::milliseconds(1000)).count());
  56     //BOOST_TEST(std::abs(static_cast<long>(ns.count())) < (err+boost::chrono::milliseconds(1000)).count());
  57   }
  58   {
  59     typedef boost::chrono::steady_clock Clock;
  60     typedef Clock::time_point time_point;
  61     //typedef Clock::duration duration;
  62     boost::chrono::milliseconds ms(500);
  63     time_point t0 = Clock::now();
  64     boost::this_thread::no_interruption_point::sleep_until(t0 + ms);
  65     time_point t1 = Clock::now();
  66     boost::chrono::nanoseconds ns = (t1 - t0) - ms;
  67     boost::chrono::nanoseconds err = ms / 100;
  68     // The time slept is within 1% of 500ms
  69     // This test is spurious as it depends on the time the thread system switches the threads
  70     BOOST_TEST((std::max)(ns.count(), -ns.count()) < (err+boost::chrono::milliseconds(1000)).count());
  71     //BOOST_TEST(std::abs(static_cast<long>(ns.count())) < (err+boost::chrono::milliseconds(1000)).count());
  72   }
  73   {
  74     typedef boost::chrono::system_clock Clock;
  75     typedef Clock::time_point time_point;
  76     //typedef Clock::duration duration;
  77     boost::chrono::milliseconds ms(500);
  78     time_point t0 = Clock::now();
  79     boost::this_thread::no_interruption_point::sleep_until(t0 + ms);
  80     time_point t1 = Clock::now();
  81     boost::chrono::nanoseconds ns = (t1 - t0) - ms;
  82     boost::chrono::nanoseconds err = ms / 100;
  83     // The time slept is within 1% of 500ms
  84     // This test is spurious as it depends on the time the thread system switches the threads
  85     BOOST_TEST((std::max)(ns.count(), -ns.count()) < (err+boost::chrono::milliseconds(1000)).count());
  86     //BOOST_TEST(std::abs(static_cast<long>(ns.count())) < (err+boost::chrono::milliseconds(1000)).count());
  87   }
  88   return boost::report_errors();
  89
  90 }
  91
  92 #else
  93 #error "Test not applicable: BOOST_THREAD_USES_CHRONO not defined for this platform as not supported"
  94 #endif
  95